2312 The Da Vinci Drive

[@MrConestogaman]

Cool idea. Thank you. My condolences on your loss of Patti...

[@ThinkingandTinkering]

thank you mate and thank you for taking the time to say that

[@robertsuminguit5191]

@@MrConestogaman I noticed the picture. I'm new to the channel and wanted to acknowledge your class and respect. I too send condolences as well.

[@RWorkman-r3c]

Thank you for sharing your time with us, and being an inspiration for those of us who love to tinker.

[@ThinkingandTinkering]

You are so welcome!

[@rjung_ch]

Looks so cool, just love the simplicity of it. Cheers 👍💪✌

[@ThinkingandTinkering]

Glad you like it!

[@rjung_ch]

@@ThinkingandTinkering I just got myself a Tinkercad account and am trying to use it and all because you make it look so simple and fun! I'm grateful to you for getting me motivated. Thanks Robert, greetings from Switzerland 🙂

[@johnwynne-qx6br]

Great looking at all these gearings and mechanisms your like a haynnes manual but you show how to build one from scratch very interesting video 👍

[@ThinkingandTinkering]

Glad you liked it!

[@ShafaqIftikhar-pw9ld]

Thankyou for great insight Robert❤❤❤❤

[@ThinkingandTinkering]

cheers mate

[@coconutterrence8549]

it was another triumph you might say to get the brain working , after retirement relaxes it . thank you once again sir ,and many cheers to you . thank you .terry👍

[@ThinkingandTinkering]

awesome mate - i am glad you liked it

[@orpheuscreativeco9236]

Those rollers : I don't know about everyone else's situation, but my local hardware store has nylon spacers that can probably be swapped in. They are very accurate, more so than a 3D printer anyway. Thanks for sharing another amazing build! 🙏

[@russellzauner]

Thanks for the heads up on the rollers being difficult in TPU; I have black rubber stoppers, standard lab stuff, maybe I can use those and some already have a hole nicely put through the center. 🙂

[@ThinkingandTinkering]

that's a nice idea mate

[@RustyInventions-wz6ir]

Great idea. Very interesting. Nice video. Thanks

[@ThinkingandTinkering]

Glad you liked it!

[@AlienLivesMatter]

Friction modifiers are commonplace in motorcycle oils where the clutch and gearbox are combined, sharing the motor oil.

[@Jimbo878]

"maybe honey" 😂

[@ThinkingandTinkering]

like it!

[@vitordelima]

LOL

[@Voidy123]

Honey is not such a bad choice, it lasts forever and gets thinner the hotter it gets. Just don't think of it as a lubricant, one day you might accidently lick your finger after an oil change on your car....

[@gerryplayz4532]

You could probably use the fingers of a rubber glove to give you a thin layer around the rollers with a bit more grip. That system looks a lot easier to make at home too!

[@ThinkingandTinkering]

nice idea mate - thanks for sharing

[@TommyApel]

don't know if it's just me but, there is a limit to just how much torque those friction surfaces can hold and if you increase their hold-ability then in turn become more like sandpaper hence wearing out the contact surfaces much quicker, with something like a windmill that is running almost constantly I would imagine this wouldn't hold up long.

[@zaeanbcegda]

My condolences on your loss, Sr.

[@ThinkingandTinkering]

thank you for taking the time to say that - it is well appreciated

[@dan.folkes]

had an idea for making a auto-brake for a wind turbine to prevent runaway. Using a non-Newtonian fluid, so that the faster it moves, the more viscus it gets. Thought it might be interesting. Especially if you are using something like a Ping-Pong ball to float in it.

[@ThinkingandTinkering]

like it mate - nice idea - there are sheer thickening gels out there

[@dmsaintrain]

The O.D. of plastic pipe is held to tight tolerances to mate with the fitting hubs. Instead of printing the rollers, maybe design the drive around short sections of pipe?

[@ThinkingandTinkering]

like it mate - cheers

[@TheWorldBelow360]

Ppl will soon be printing their own snap tight service droids. Then maybe holidays will become less expensive.

[@ThinkingandTinkering]

or life will just be one big holiday!

[@Biggles732]

Order of magnitude is a tenfold difference, that's a lot.

[@ThinkingandTinkering]

yes it is lol

[@dSquared0162]

Old printer or vhs rollers… small and long-lasting. 👍

[@ThinkingandTinkering]

nice

[@ForTheFallenofTheMatrix]

🙏Condolences.

[@MickBasterd]

For a "sticky lubricant" I wonder if vegetable glycerin would work?

[@renemarquez7947]

That’s cool 😎

[@ThinkingandTinkering]

cheers mate

[@grendel1960a]

love it, and all I have made is a clacks tower on my laser cutter (pics in the discord pages)

[@ThinkingandTinkering]

it doesn't matter what you make mate - making is the thing! I'll check it out - cheers

[@adamstarr9369]

Skateboard bushings would work as rollers

[@ThinkingandTinkering]

that's clever - thank you for sharing mate

[@DudleySmith-ht7nr]

Would there be a slippage in both the plastic and metal devices? Gears do have backlash, but essentially no slippage.

[@angelusmendez5084]

Awesome!

[@Mark_Linford]

🙂

[@ThinkingandTinkering]

cheers mate

[@michaelgarrow3239]

At some point everything is elastic…

[@ilookatnews9745]

Could you use teflon for the wheels?

[@JBSilverback]

Want grip ? try Griptec , the spray rugby players use on their hands

[@ThinkingandTinkering]

cheers mate

[@yannmassard3970]

it s insane, I made one today (failed for 3 weeks to do compound version, tried various techniques), actually PLA is better for this. It compressed just the right anount, I made a 1:45 compound ration that runs on a 2euros stepper ... EDIT I forgot to mention that you need a non newtonian grease for it to be fully backdrivable, I used corn stach water and oil to increase static torque

[@ricodegallo3060]

👍🏽

[@ThinkingandTinkering]

cheers mate

[@InspMorse85]

Have you considered using TPE in place of TPU? I have found it to have a grippier quality over TPU. It is a bit softer which may be good or bad. I may have to give it a go...

[@ThinkingandTinkering]

I will give it a go mate - cheers

[@InspMorse85]

@@ThinkingandTinkering I use eSun eLastic (other brands are available!) for tyres and other contacting surfaces, slow slow slow to print but good end results.

[@wibblywobblyidiotvision]

Hello Robert. Anything relying on elasticity to maintain contact is going to have enormous losses compared to a gear or chain drive, a large amount of energy goes into squashing those rollers, and unless you're specifically designing to recover some of that energy as they return to their unsquished form, it's lost. The Nuvinci ebike drive is hideously ineffecient next to a comparable gear drive unit (I believe the difference is close to an order of magnitude), but that's a relatively low priority compared to the flexibility a CVT gives to an ebike.

[@yasirrakhurrafat1142]

But wouldn't they not really lose quite that much? As they're not being let to return to their original form, they're just rolling. I'm almost betting rotating those squishies 360°s by moving the sun or ring, requires less energy. Than squishing them from their base form, to the squished form.

[@ThinkingandTinkering]

This isn't a CVT mate

[@wibblywobblyidiotvision]

@@ThinkingandTinkering I know it isn't. But the NuVinci one is.

[@darkfrei2]

Just pint the spring rollers to make no gap.

[@ThinkingandTinkering]

ok - go for it

[@yasirrakhurrafat1142]

Two different materials. Would need multi extrusion printer. Not possible with normal printer.

[@darkfrei2]

@@yasirrakhurrafat1142 The spring roller must have the gap with inclination 45 degree - possible!

[@yasirrakhurrafat1142]

@@darkfrei2 oh, very complicated. But how with just one extruder, youd need tpu (squishy rollers) as well as hard materials abs , pla , hdpe or sumthing printing at the same time. Would likely be easier to split and assemble the ring gear and assemble it afterwards somehow.

[@shlomig1495]

Glue the gear 20 millimeters not centimeters...😅

[@start7047]

gear at 20cm

[@redfields5070]

Please do something about the type of sound recording at the beginning of the video. It is difficult to understand you when you record in that way. Perhaps bring the microphone closer to you.

[@rose-ey6ct]

You typed too quickly. It's Nu-Vinci. Regardless I have an ebike with one in it. I love it, it is super, but the losses compared to a direct chain drive are immense. Circa 15% against circa 1.5%. When on holiday and I hire a conventional bike, the difference is very noticeable, with the standard bike showing significantly more torque at similar ratios.

[@ThinkingandTinkering]

lol - i did indeed - i have changed it - thanks for the heads up and the feedback on how the drive performs

[@VovelPunch]

the drive isnt very good... Cycloidal drives are the gigachad of all drives

[@yannmassard3970]

meh